<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>首屏</title>
	<script type="text/javascript">
		window.pageStartTime = Date.now();
	</script>
</head>
<body>
		<!-- 首屏可见模块1 -->
		<div class="module-1">

			<span>1</span>
		</div>
		<!-- 首屏可见模块2 -->
		<div class="module-2">
			<span>1</span>
			<span>1</span>
		</div>
		<script type="text/javascript">
			window.firstScreen = Date.now();
		</script>
		<!-- 首屏不可见模块3 -->
		<div class="module-3">
			<span>1</span>
			<span>1</span>
		</div>
		<!-- 首屏不可见模块4 -->
		<div class="module-4">
			<span>1</span>
			<span>1</span>
		</div>
</body>
</html>


